Replace your belts, and check that your spring loaded motor is holding tension. Belts are 211124 and 211125.http://www.appliancepartspros.com/partsearch/model.aspx?model_id=47786I have seen where tub seal had just enough of a seepage leak to corrode bearing sleeve. This will cause drag. If washer is spinning up to speed and spinning clothes out good, then you probably just need to replace the belt. There is a spring kit for the motor if that's the case.

These are special belts that are designed to slip a little bit. If the transmission leaks oil it will get on the belts and make them sticky. This can lead to the belts overheating. The cracks are from the belt being too hot and the rubber hardening.Another cause is if the transmission pulley is hard to turn. In one direction it should turn quite easily. That is the agitate direction. The other way there will be some initial resistance as you have to overcome the brake. If it turns hard either way let us know and we will discuss the next step.